Water and environmental management

Use of space and resources, initiated by human populations, which can generate different pressures. The same pressure can be caused by several activities.

The ability of the sample used to calculate the indicator to reflect the characteristics of the entire sampled population, thereby ensuring the reliability of the indicator.

Quantity of data available relative to the minimum requirements for an indicator to be reliable in describing the phenomenon it reflects, and precise enough for the intended objective. Data abundance mainly depends on sampling density and frequency.

An indicator is considered robust when its measurement or calculation remains reliable even when conditions (spatial, temporal, impact intensity, or others unrelated to the change being measured) vary. The relationship between the biodiversity components used in the calculation and the impact on biodiversity remains stable. The value of a robust indicator is little or not affected by imprecise measurements or errors, variability in measurement instruments, missing data, or confounding variables.

A value that allows assessment of whether objectives have been achieved, and thus measures the progress made. In the context of the ONB (French National Biodiversity Observatory), target values are set by national or international legal texts.

An indicator is effective when it synthesizes information precisely enough to describe the phenomenon being studied, facilitates its understanding by the general public, and when its production cost is not a limiting factor.

An indicator is sensitive when it can distinguish between situations that one aims to differentiate. A sensitive indicator quickly signals a meaningful change. It is therefore suited to the appropriate level of detection for the intended objectives. This requires that measurements be carried out at relevant time intervals and spatial scales.

An indicator is accurate when it measures the phenomenon it is intended to describe with a low margin of error or uncertainty. Achieving a high degree of accuracy is generally associated with the use of proven tools and methods, demonstrated by low variability in measurements when repeated under similar conditions.

Méthode de gestion des eaux pluviales visant à rester au plus près du grand cycle naturel de l’eau en privilégiant l’infiltration des eaux au plus près de leur point de chute et, en cas d’infiltration partielle, à retenir l’excédent et à le rejeter  à débit limité.

Un bassin DCE correspond: - soit à un district hydrographique national (exemple: Les cours d'eau de la Corse) ; - soit à une portion d'un district hydrographique international située sur le territoire d'un état membre (exemples: la Meuse; la Sambre). Chaque bassin DCE dispose d'une autorité compétente coordinatrice qui est l'instance responsable de la mise en oeuvre de la DCE au sein du bassin DCE. Sa représentation cartographique est l'agrégation des polygones des sous bassins DCE administratifs le composant.